Military Engineer Services Tender

Material and labour for cleaning and preparation of roof/wall (RCC/bricks/tiles/cement concrete) surface and made free of dirt, foreign particles, laitance followed by grinding all protrusions to make surface modulated. Thereafter, inspection for cracks on the surface caused by thermal expansion/ contraction and repairing the cracks on the surface caused by thermal machine, filled with repair mortar/General purpose grout in the proportions as recommended by manufacturer, supply and applying high performance hybrid polyurea waterproofing coating spray/hand applied liquid membrane with following specifications complete all as specified and directed. (a) Elongation of range 400% 600%. (b) Tensile strength of 8-12 N/mm2. (c) Crack bridging ability of 3.00-4.00mm. (d) Hardness (Shore ‘A’ ASTM D2240) of range 50-70.The application shall include final base preparation, epoxy primer application in ratio 1.1 (resin: hardener) with 100% water dilution and application of hybrid polyurea in two coats in 6 hrs interval to achieve total min thickness 1 to 1.50mm. The application/ treatment shall be carried out by authorized rep of approved specialist firm/manufacturer. Note:- The defect liability period of water proofing treatment to RCC roof slab including sunken floor shall be 10 years and the contractor shall be responsible to keep the entire building(s) free from leakage/seepage for a period of 10 years after certified date of completion. The contractor may obtain a similar guarantee from the specialist firm engaged by him for the purpose

Material and labour for cleaning the surface and making free of dirt, foreign particles, laitance followed by grinding all protrusions to make surface modulated, thereafter, inspection for cracks on the surface caused by thermal expansion, contraction. cutting the grooves with suitable cutter machine in "v" groove filled with repair mortar/micro concrete/general purpose grout as recommended proportionally as per recommendation of manufacturer. Making of golas at all the corners with polymer modified mortar 1:4 cement sand with acrylic polymer 3.5% by weight of cement) complete all as specified and directed.

Material and labour for waterproofing expansion joint by providing and applying thermoplastic elastomer tape 200mm wide 1mm thick, a modified flexible TPE based root resistant membrane with chemical resistant. The tape system must be tensile strength 5N/mm2 according to ASTM D412; tear strength 25N/mm according to ASTM D 624; elongation 400% according to ASTM D 412; chemically resistant to several chemicals; passes low temperature foldability at -40◦C according to ASTM C 1305; passes artificial weathering according to ASTM G 154. The tape must be capable of servicing a wide range of temperature of -40◦C to +80◦C. The tape, adhesive and repair mortar must by provided by same manufacturer for full compatibility. The same is applied using epoxy adhesive of layer 2mm to prepare substate on both sides of joint and both ends of the tape embedded into the adhesive with width of 38mm complete all as specified and directed